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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 832 · 40 questions
TalentJR

How to do it in your head (Make 10): Bonds to 10: 1 + 9, 2 + 8, 3 + 7, 4 + 6, 5 + 5. Bonds to 100: the ones make 10, and the tens make 9 (because the ones already gave one ten). If the number ends in 0, the tens make 10: 40 + 60 = 100.

NameDateTime takenScore ___ / 40
  1. 1.18 + ? = 100
  2. 2.86 + ? = 100
  3. 3.56 + ? = 100
  4. 4.8 + ? = 10
  5. 5.9 + ? = 10
  6. 6.33 + ? = 100
  7. 7.1 + ? = 10
  8. 8.7 + ? = 10
  9. 9.23 + ? = 100
  10. 10.32 + ? = 100
  11. 11.2 + ? = 10
  12. 12.38 + ? = 100
  13. 13.65 + ? = 100
  14. 14.49 + ? = 100
  15. 15.66 + ? = 100
  16. 16.28 + ? = 100
  17. 17.76 + ? = 100
  18. 18.5 + ? = 10
  19. 19.79 + ? = 100
  20. 20.4 + ? = 10
  21. 21.42 + ? = 100
  22. 22.60 + ? = 100
  23. 23.61 + ? = 100
  24. 24.51 + ? = 100
  25. 25.87 + ? = 100
  26. 26.89 + ? = 100
  27. 27.11 + ? = 100
  28. 28.34 + ? = 100
  29. 29.6 + ? = 10
  30. 30.21 + ? = 100
  31. 31.59 + ? = 100
  32. 32.63 + ? = 100
  33. 33.19 + ? = 100
  34. 34.62 + ? = 100
  35. 35.14 + ? = 100
  36. 36.3 + ? = 10
  37. 37.85 + ? = 100
  38. 38.27 + ? = 100
  39. 39.17 + ? = 100
  40. 40.24 + ? = 100

Answer key

  1. 82
  2. 14
  3. 44
  4. 2
  5. 1
  6. 67
  7. 9
  8. 3
  9. 77
  10. 68
  11. 8
  12. 62
  13. 35
  14. 51
  15. 34
  16. 72
  17. 24
  18. 5
  19. 21
  20. 6
  21. 58
  22. 40
  23. 39
  24. 49
  25. 13
  26. 11
  27. 89
  28. 66
  29. 4
  30. 79
  31. 41
  32. 37
  33. 81
  34. 38
  35. 86
  36. 7
  37. 15
  38. 73
  39. 83
  40. 76

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